Olight i3T EOS vs Streamlight MicroStream USB size comparison
The Streamlight MicroStream USB is 9 mm (0.35 in) longer than the Olight i3T EOS, with about the same max diameter/width. It is 7 g lighter (with battery).
The Streamlight MicroStream USB is 9 mm (0.35 in) longer than the Olight i3T EOS, with about the same max diameter/width. It is 7 g lighter (with battery).
Dimensions
| Olight i3T EOS Check price ↗ | Streamlight MicroStream USB Check price ↗ | |
| Length | 89 mm (3.50 in) | 98 mm (3.86 in)+9 mm |
| Head / width | 15 mm (0.59 in) | 15 mm (0.59 in)same |
| Body | 15 mm (0.59 in) | 15 mm (0.59 in)same |
| Weight | 41 g with battery | 34 g with battery−7 g |
| Battery | AAA | Built-in |
| Max output | 180 lm | 250 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $17.99 at olight.com, as of Nov 4, 2026 | $41.50 at batteryjunction.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | batteryjunction.com sourced |
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i3T EOS vs MicroStream USB: how they differ
Size and weight
The Olight i3T EOS is the shorter light: 89 mm (3.50 in) against 98 mm (3.86 in), a difference of 9 mm (9%). At their widest points they are about the same (15 vs 15 mm). The Streamlight MicroStream USB is 7 g lighter (34 g vs 41 g, with battery).
Brightness and throw
The Streamlight MicroStream USB is rated brighter: 250 lm maximum vs 180 lm for the Olight i3T EOS, 39% more.
Battery
The Olight i3T EOS runs on a removable AAA battery; the Streamlight MicroStream USB runs on a built-in rechargeable battery. Only the Olight i3T EOS lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Olight i3T EOS was $17.99 at olight.com and the Streamlight MicroStream USB $41.50 at batteryjunction.com, so the Olight i3T EOS cost $23.51 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Olight i3T EOS if you want a shorter light (9 mm shorter) and a removable cell you can swap. Choose the Streamlight MicroStream USB if you want less weight (7 g lighter), more output (250 lm vs 180 lm) and a built-in battery with no separate cell to buy. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Olight i3T EOS Check price ↗ Streamlight MicroStream USB
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i3T EOS vs MicroStream USB FAQ
Which is smaller, the Olight i3T EOS or the Streamlight MicroStream USB?
The Olight i3T EOS is the shorter light: 89 mm (3.50 in) against 98 mm (3.86 in), a difference of 9 mm (9%). At their widest points they are about the same (15 vs 15 mm). The Streamlight MicroStream USB is 7 g lighter (34 g vs 41 g, with battery).
Which is brighter, the Olight i3T EOS or the Streamlight MicroStream USB?
The Streamlight MicroStream USB is rated brighter: 250 lm maximum vs 180 lm for the Olight i3T EOS, 39% more.
Which is cheaper, the Olight i3T EOS or the Streamlight MicroStream USB?
When we checked on Nov 4, 2026, the Olight i3T EOS was $17.99 at olight.com and the Streamlight MicroStream USB $41.50 at batteryjunction.com, so the Olight i3T EOS cost $23.51 less. Prices change often, so check the current price before you buy.
Do the Olight i3T EOS and Streamlight MicroStream USB use the same battery?
The Olight i3T EOS runs on a removable AAA battery; the Streamlight MicroStream USB runs on a built-in rechargeable battery. Only the Olight i3T EOS lets you swap in a charged spare.
Compare Olight i3T EOS with similar lights
Compare Streamlight MicroStream USB with similar lights
More
Sources
- Olight i3T EOS: specs from Olight product page (manufacturer); manufacturer published specs as listed by batteryjunction.com. Price $17.99 from olight.com, checked Nov 4, 2026; prices change often.
- Streamlight MicroStream USB: specs from manufacturer published specs as listed by batteryjunction.com. Price $41.50 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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